Bonaventure — on Rom 5:5 (Itinerarium Mentis in Deum, Chapter 4)

“When our mind has been filled with all these intellectual lights, it is inhabited by the divine Wisdom as a house of God, having been made a daughter of God, a spouse and friend; having been made a member of Christ the Head, a sister and co-heir; having been made no less a temple of the Holy Spirit, founded through faith, elevated through hope, and dedicated to God through holiness of mind and body. All of which the most sincere charity of Christ accomplishes, which is poured forth in our hearts through the Holy Spirit, who has been given to us, without which Spirit we cannot know the secrets of God. For just as the things of a man no one can know except the spirit of man which is in him, so also the things of God no one knows except the Spirit of God.”